Configured for high-frequency non-contact displacement acquisition within machinery protection monitoring loops, the Bently Nevada 330706-005-46-10-02-00 (330706-005-46-10-02-00 Proximity Probes) provides direct physical/electrical execution.

Ordering Nomenclature & Variant Matrix

• Base Model and Configuration: 330706 (3300 XL 11 mm reverse mount proximity probe)
• Unthreaded Length Option: 005 (0.5 inch unthreaded profile dimension)
• Overall Case Length Option: 46 (4.6 inch total case length structure)
• Total System Cable Length: 10 (1.0 meter integrated cable length)
• Connector Type Option: 02 (Miniature coaxial ClickLoc connector assembly)
• Agency Approval Option: 00 (Standard unclassified hazardous area profile)

Hardware Specifications Table

Eddy-Current Probe Scaling & Rotor Dynamics

The 11 mm transducer architecture delivers a wider linear range suitable for larger turbomachinery journal and thrust applications. Output scaling maintains a linear sensitivity of 3.94 mV/um across the extended measurement span. Gap voltage validation must sustain a nominal -10 VDC target at mid-range position during cold rotor alignment to prevent clipping during transient vibration events. Coaxial cross-talk suppression requires proper shielding separation across multi-channel monitor racks.

Standard Delivery Manifest

• 1 x 3300 XL 11 mm Reverse Mount Proximity Probe Assembly
• 1 x Reverse Mount Mounting Hardware Kit
• 1 x Protective Coaxial Terminal Cap

Physical Installation & Routing Procedures

• Mounting Alignment: Secure the reverse mount assembly through the machine casing flange, maintaining strict perpendicularity to the observed shaft target.
• Air Gap Clearance: Ensure adequate radial separation from surrounding metallic structures to avoid parasitic eddy-current damping effects.
• Cable Protection: Route the integrated coaxial lead through dedicated protective conduit, avoiding sharp bends that violate minimum radius limits.
• Connector Locking: Fasten the ClickLoc coaxial termination firmly to prevent intermittent contact caused by continuous mechanical vibration.

Frequently Asked Questions and Technical Responses

• What is the nominal output sensitivity for this 11 mm transducer model?

  The output scale factor is calibrated to 3.94 mV/um when paired with an approved 3300 XL 11 mm Proximitor sensor.

• Why is a reverse mount configuration utilized in certain installations?

  Reverse mount probes are designed for internal mounting applications where external thread adjustment is constrained by machine casing geometry.

• What is the linear measurement range of the 3300 XL 11 mm system?

  The extended linear operational range spans 4.0 mm, providing twice the range of standard 8 mm systems.

• How is the static gap voltage verified during system commissioning?

  A digital voltmeter is connected to the monitor channel terminals to confirm the static baseline matches the -10 VDC target.

• Can this probe be used with standard 8 mm system components?

  No, 11 mm probes require matched 11 mm Proximitor sensors and extension cables to maintain correct electrical scaling.

• What target material is assumed for factory calibration scaling?

  Factory linear response is calibrated against standard AISI 4140 carbon steel shaft material targets.

• What is the primary cause of signal drift during continuous operation?

  Moisture contamination inside the coaxial connector or mechanical degradation of the fluorocarbon cable jacket.

• How should excess coaxial cable be stored within junction housings?

  Coil the excess cable loosely, adhering strictly to minimum bend radius parameters to prevent internal conductor failure.